func (e *DropFilesEvent) Detach(handle int) {
e.handlers[handle] = nil
for _, h := range e.handlers {
if h != nil {
return
}
}
win.DragAcceptFiles(e.hWnd, false)
}
func (e *DropFilesEvent) Attach(handler DropFilesEventHandler) int {
if len(e.handlers) == 0 {
win.DragAcceptFiles(e.hWnd, true)
}
for i, h := range e.handlers {
if h == nil {
e.handlers[i] = handler
return i
}
}
e.handlers = append(e.handlers, handler)
return len(e.handlers) - 1
}